[8.17] Add missing ES|QL, data stream, inference, and PKI security specifications (#119472)

[pquentin]

Backport

This will backport the following commits from main to 8.17:

• Add missing ES|QL, data stream, inference, and PKI security specifications (#119472)

This pull request was not backported to 8.17, but those APIs are in 8.17 (and earlier versions, but I'm interested in 8.17 here).

API name	Elasticsearch PR	Introduced in	Specification PR	Backported to
esql.async_query_delete	#103628	8.13	elastic/elasticsearch-specification#3398	8.17
indices.get_data_lifecycle_stats	#101845	8.12	elastic/elasticsearch-specification#3418	8.17
inference.update	#114457	8.16	elastic/elasticsearch-specification#3399	8.17
security.delegate_pki	#45906	7.4 (!)	elastic/elasticsearch-specification#3402	8.17

Questions ?

Please refer to the Backport tool documentation